It started with apatch on my scrotom.Iwent to the doc,and got testd for everything,test came back negative.He said it was heat rash ,probably.1 month later , last night I noticed about four to six patches at the base of my penis.It does not itch I did not even know it was there until I looked down there.I putsome hydrocortizon and it still is there ,no change.What is it?